1. An object has two rods attached to form a + sign. Each rod is 20-cm long and has a mass of 0.500 kg. A solid 0.2-kg sphere is attached at the end of each rod, of radius 5-cm. A) Calculate the moment of inertia of the object. B) If the device is initially at rest, and a torque of 3.00 m-N is applied to the object for 10.0 seconds, what will its angular momentum be? C) Use this and the answer to part A) to calculate its angular speed, its average angular speed, and therefore the total angle it has rotated. D) What will its kinetic energy be?
1. An object has two rods attached to form a + sign. Each rod is 20-cm long and has a mass of 0.500 kg. A solid 0.2-kg sphere is attached at the end of each rod, of radius 5-cm. A) Calculate the moment of inertia of the object. B) If the device is initially at rest, and a torque of 3.00 m-N is applied to the object for 10.0 seconds, what will its angular momentum be? C) Use this and the answer to part A) to calculate its angular speed, its average angular speed, and therefore the total angle it has rotated. D) What will its kinetic energy be?
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Transcribed Image Text:1. An object has two rods attached to form a + sign. Each rod is 20-cm long and has a mass
of 0.500 kg. A solid 0.2-kg sphere is attached at the end of each rod, of radius 5-cm.
A) Calculate the moment of inertia of the object.
B) If the device is initially at rest, and a torque of 3.00 m-N is applied to the object for 10.0
seconds, what will its angular momentum be?
C) Use this and the answer to part A) to calculate its angular speed, its average angular
speed, and therefore the total angle it has rotated.
D) What will its kinetic energy be?
E) Show that this is equal to the work that the torque did.
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